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01-18-2017 2:02 PM

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  • Posted in thread: PatWankel Rotary Engine on 01-12-2017 at 12:11 PM
    Thanks. For some reason I didn't realize that the seals were in the outer case. However,
    everything I said about an accurate and smooth surface is still true. It just needs to be on
    the inner element....

  • Posted in thread: Timing for SI 2-stroke? on 01-12-2017 at 12:01 PM
    QUB is Queens University of Belfast. The late Gordon Blair did a lot of the basic research
    there that lead to the modern two stroke design. Unlike most two stroke developers, he
    published his work and...

  • Posted in thread: Timing for SI 2-stroke? on 01-11-2017 at 04:15 PM
    This may be a little late, but a better design for a cross flow scavenged engine is the QUB
    crossflow design. It has a better combustion chamber shape and should be easier to
    build.Lohring Miller

  • Posted in thread: PatWankel Rotary Engine on 01-11-2017 at 12:49 PM
    I doubt that milling will leave an accurate and smooth enough surface on the outer case to get
    good sealing. However, a CNC grinding machine should be able to produce an accurate surface in
    the same w...

  • Posted in thread: PatWankel Rotary Engine on 01-10-2017 at 02:27 PM
    Fascinating. The problem with the Wankel, Liquid Piston, and similar concepts has always been
    sealing. Their designs were 2D concepts that could be made accurately with 20th century
    methods. However, ...

  • Posted in thread: piston ring materials on 12-03-2016 at 03:23 PM
    I got the very small amount of ductile cast iron I needed from McMaster-Carr. While I'm just
    starting to make rings, the machining process seems to go very well. The usual recommendation
    is Meehanite,...

  • Posted in thread: Materials search on 09-30-2016 at 02:36 PM
    McMaster Carr usually has most common things including bearing balls and springs. Boca Bearings
    is a great source of all kinds of rolling element bearings and parts. Associated Spring has
    lots of diff...

  • Posted in thread: Model Engine Maker on 09-26-2016 at 09:51 PM
    What happened to Miller

  • Posted in thread: CAMBIELA engine on 09-25-2016 at 01:49 PM
    A simpler system would be the epicycloid crank mechanism. The crankpin rotates the small gear
    around the ring gear and the eccentric gives a straight reciprocating action to the rod in the

  • Posted in thread: Rotary Table vs Dividing Head ? on 09-17-2016 at 02:40 PM
    I only have a dividing head with a screw on chuck. I use it all the time to machine accurate
    arcs. It's easiest to machine an arc that's concentric with another round area that can be held
    in the chuc...


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